Effect of Undensified Silica Fume on the Dispersion of Carbon Nanotubes within a Cementitious Composite

S. Alrekabi, A. Cundy, Raymond L.D. Whitby, A. Lampropoulos, I. Savina

Research output: Contribution to journalConference article

4 Citations (Scopus)


The synergistic effect of multi-walled carbon nanotubes (MWCNTs) and Undensified Silica Fume (USF) on the microstructure of cementitious composites has been studied. In the current work, USF was used to enhance the dispersion of nanotubes throughout the composite and prevent the re-agglomeration of nanotubes by providing a physical barrier of particles of small size. Ultrasonication was employed to disperse MWCNTs in water in the presence of polycarboxylate-based superplasticizer (PCE) as a dispersion agent. The results indicate that incorporation of USF considerably improves the dispersion of nanotubes in the composites, with subsequent enhancement of composite packing density. This enhancement can be attributed to the synergistic effect of MWCNTs and USF in reducing the volume of pores through the cementitious composites.

Original languageEnglish
Article number012011
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - Apr 21 2017
EventApplied Nanotechnology and Nanoscience International Conference 2016, ANNIC 2016 - Barcelona, Spain
Duration: Nov 9 2016Nov 11 2016



  • Cementitious composites
  • Undensified Microsilica (USF)
  • multiwall Carbon nanotubes (MWCNTs)

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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